Exodus 15:23-25

Revised Geneva Translation

²³ And when they came to Marah, they could not drink from the water of Marah, for they were bitter. Therefore, the name of the place was called “Marah”.

²⁴ Then the people murmured against Moses, saying, “What shall we drink?”

²⁵ And he cried to the LORD, and the LORD showed him a tree. When he cast into the waters, the waters became sweet. There He made an ordinance and a law to them; and there He tested them,